1',3'-Dimethylspiro(1,3,4,5',6,6',7,12b-octahydro-2H-benzo(b)furo(2,3-a)quinolizine)-2,4'-pyrimidin-2'-one 111466-41-2 L 657,743 L 657743 L-657,743 L-657,743-002W MK 912 Spiro(2H-benzofuro(2,3-a)quinolizine-2,4'(1'H)-pyrimidin)-2'(3'H)-one, 1,3,4,5',6,6',7,12b-octahydro-1',3'-dimethyl-, (2S-trans)-